Liquid gauge



Dec. 21 1926. y 1,611,272

' vvT. A.` HILL LIQUID GAUGE Filed Mar 13. 1925 l @noe-ubbi. --l Z-//W Patented Das. 21,19%.

U ET E E Tsi? L THOMAS A. HILL, on sitotorri-.Yin Niews YORK. i

' Lieurn GAUGE.

Application mea March 13,1925. lserial No. 15,215.

invention relates to improvements in liquid gauges, and more particularly has ref-y erence to, and is illustrated in the accompanying drawings, in its application to a- 5 gauge especially adapted for use uponV the dashboard of-an automobile forindicating the amount of gasolene in the tank thereof,

although of course it willbe readily under-r stood that the gauge is vadapted for use yfor other purposes. l

Referring to said drawings, Fig. 1 illustrates in perspective, a "suitable form'; of gauge completely assembled andv closed ready for shipment." Fig. 2 `is across-section on the line 2-2of thev same. Fig. 3 is a crosssection on the line 3-3' of the same. Fig. 4v is a longitudinal s ectionV looking sidewiseat a modified form of the gauge.A 4Fig. r5 is a crosslsection on the line i4-.5f of`pFig.4; Figlf 6v is a longitudinal section on the. line 6.-6 of Fig. 3. F ig.-7 is a plan view of one of the gaskets used in the form 1, 2, 3,* and 6. Y. Y

In the form shown in Figs. 4 and 5, 8 indicates the body portion y'which may l be cast from-metal such as an alloy, and is vpro-y vided injthe front with a glass tube 9, with suitable scale marks adjacent the side there- Y of, for indicating the height of,A the indicatgauge liquid which also venters 13 and 14 as shown.

5 18 indicates a finger pump comprising an` outer shell 19, provided with an outlet passage 20 for air or other gas to be injected into the pressure circuit, and21 indicates another passage ycommunicating with thev bore 13, which takes a larger quantity of `air than the passage 20,l the passage 21 being preferably elongated asindicated in lflig.l 5.- 'lhe pump is provided ywithfa threaded base 22 for securingthe same to the body portion' 8 ofithe gauge', andthe lower part vof the central bore 23 of the pump,fis"lpreferably restricted `to provide a ledge24 for the.

spring: 25.l 26 indicates a button plunger e shown in Figs.`

the passages having an internal centralvbore 27, which g 1,611,272, asics.

when depressed with the finger 'againstthe action of the spring .25, compresses the ail' within the chamber 23, and into the bores 9, 13, and 14,' the greater` quantity passing' l through the bore vv13, andl passing down u through thevindicator liquid 10,the're`in,'and

beneath the lower edge 28 4of the separating wall, into the bore 14p`assing up through By Vthis method of injecting or replenishingV air the pressure circuit,the reading column 9 is] not violently disturbed, Vwhereas the indicator liquid into the pressure cir- .if' the air were pumped through the/reading column 9 into the pressure circuit, the liquidY vou 'roA

would be entirely forced out of the'reading column," andl when returning would be n frothy, and require a short vperiod ofV time before coming tofrest', sothat a proper -read- V ing could betaken, whereas .in the :present instance only a'smalhamountoffthe air passesinto` the top of `thefreading .tube9 so y throughthe 4passage 20, theV major portion of the air passing down through'the tube13,

and beneath, the lower .end of the sepa-' rating portion lof the gauge 28, into the pressure circuit, thusthere is aybalancin'gof pressure at `both ends of the reading column, maintaining the v,same substanvtially stable,- whiletheeair is being replenished in the pressure circuit. The threadi ed cap 29 is adapted to engagenthe internal threads 30, in the top of the pump,

as the button 26 is depressed, so that the in-V strument vmay be properly sealedfor ship- ,y

ment with'vthe indicating liquid therein, and- Vfor that purpose a suitable cap such as 31, orV

other suitable means may be vused at theend of the connecting tube 15. .y

' inthe modification shown 1n Figs. 1 to 3, i'

and 6 inclusive, the body portion r,of the gauge is preferably formed substantiallyy as indicated at 32, the indicating tubev being indicated bythe reference vcharacter- 337, and the reading scale by referencecharacter 34.

The body port-ion32 maybe cast or drilled g i withbores or passages 35 and 36, the latter being preferably shorter fand connecting with the pressure tube 37. In the top of the body portion, a circular lrecess 38 maybe formed, andat the bottom of thepbodyportion, a storage base 39 may-be provided, having a storage well 40, connected with the 'rel' cess 38 by the bore or passage 35, said storf age well 40 alsoV communicating with the wardly in'tothe pump, withthe possibility ofV top of the body portion of the gauge, the lcentral'hole 45 of said gaskets being co-eX- tensive with the storage well 40 and space 38 respectively; yThe finger pump 46, may besiinilar in construction to the one illustrated in connection with Fig. 4, except that it will be noticed that there is onlyone outlet 47V therefrom, said outlet communicating t with the recess or chamber 38, which opens 'intothe passages 35, and42.V rlhe air outlet 47 ofthe puinpit will be noticed comes Vimmediately over thecentre of the recess 38,

and between the passages referred to, so thatV inv the event of the indicator fluid being jolted or forced'upwardly, it strikes the bottom 48 of the pump, and is deflected `downwardly again instead of passing upescaping through the push button opening27"."e`

In this form also the column of indicating liquid in the indicator tube Vis fairly stabilized while the replacement of air is being provided for, and in order to get at the gauge for replacing liquid, cleaning, or repairs, the 'pump may beconveniently removed by withdrawing the screws 49, Vand by removing the base as stated. ylhe cap A50, enclosing the button 26, may also be removed by unscrewing the saine as shown.

' It will'r beA understood that the lower the separating web 28 projects, the less indicating Huid will be required for providing a properseal, but it should be high enough to allow the air to escape beneath the same from the passage 13 to the passage 14, or from the passage 35 to the passage 36, otherwise air will pass entirely'through theV readingcol-A umn or glass rtube ,"a'nd cause .an undue disturbance of the fluid therein, thereby frothing the same and delaying an accurate reading. In a properly-designedgauge according to the preferred form of my invention no air will pass out of the bottom of the Vreading glass or tube. but will'pass down and through the fluid in the middle leg 13 or 35 of the gauge and from therey out into the Vpressure line l5 vor 37. For the foregoing ing effect upon the column of fluid in the .reading column..v

l. ln an article of the class described, aV

body portion provided with a well in the base thereof containing indicating liquid, an air restoring device opei'ativelyrconnected at the upper part ofsaid body portion, said body portion also having passages commu- Vro nicating between said well and said restoring device, another' passage in said body portion also communicating with said' well and adapted to be connected tov a tank containing liquid to be ga-uged, said indicating liquid normally level in the Vlower portions of said passages, said restoring device being adapted to force ,air downwardly through said firstinentioned passages and through said indicating liquid beyond said other passage.V

2. In an article of the class described, a Y

bodyportion provided with a well in the base thereof containing indicating liquid, an air restoring Vdevice operatively lconnected at they upper part of said body portion,said

body portionalso yhaving passages commu-v sie Anicating between said welland said restor-Y ing-device, another passage in said body portion also communicating with sai'dwell and adapted to be'c'onnected to 'a tankcontaining liquid to be gauged, said indicating liquid normally level'in the lower portions of said passages, said restoring device being adapted to'force air downwardly through said'first mentioned passages and through said indicatingliquid beyond said other passage, said air restoring device removably vsecured to said article'. ,e Y

3. In van article of the' classfdescribe'd, a body portion provided with a well in the base thereof containing indicating liquid, an air restoring deviceoperatively connected at the upper partof said body portion, said body portion lalso having passages communicating between said well and said restoring device, another passage yin vsaid body-portion also communicating with said well" andV adapted to b-e connectedto a tank containing Vliquid to begauge'd, said indicating liquid normally'level in the lower portions Vof said passages, said restoring device being adapted to force air downwardly through said first mentioned-passages and through said indicating liquid'beyond said other passage, said article having front corner portions extending outwardly beyond the center of the front portion of said article. l

4. ln an article of the class described, a body portion provided with a Ywell in the base thereof containing indicating liquid, an air restoring device operatively connected at thek upper part of said body portion, s'aid body portion'also having passages V'cominul ido lltl

` base thereoil containing indicating liquid, an Y air restoring ydevice operativelyvconnected atV the upper part of said body portion. said nicating between said well and said restoring device, another passage in said body portion also communicating with said Well and M adapted to be connected to a tank containing liquid to begauged, said indicating liquid normally level in the lower portions of said passages, said restoring device being adapted to forcel airdownwardly through said first mentioned passages and' through said indieating liquid beyond said other passage, said` restoring device having a removable top.

5. In an article of the class 'described,a

body portion provided with a well in the body portion also having passages communicatingbetween said well and said restoring device, another passage in' said body `portion also communicating with said well and adapted to beV connected to a tank containing dicating liquidA beyond saidfother passage,y

and a removable article. Y .v A

lIn testimony whereof I hereunto aix my signature'. j

plug in the bottom Voi" said lTHOMAS A. HrLLg Y 

